A beam of monochromatic blue light of wavelength 4200 Å in air travels in water `(mu = 4//3)`. It's wavelengths in water will be

A beam of monochromatic blue light of wavelength 4200 Å in air travels in water of refractive index 4/3. Its wavelength in water will be:

A beam of menochromatic blue light of wavelength 4200 Ål in air travels in water of refractive index 4/3. its wavelength in water will be

A beam of menochromatic blue light of wavelength 4200 Ål in air travels in water of refractive index 4/3. its wavelength in water will be

A beam of menochromatic blue light of wavelength 4200 Ål in air travels in water of refractive index 4/3. its wavelength in water will be

A beam of monochromatic blue light of wavelength 4200 Å in air , travels in water of refractive index (4)/(3) . What is the its wavelength in water ?

A beam of monochromatic light of wavelength 6000 Å in air enters water of refractive index ""_(a)n_(w)=(4)/(3) . What is its wavelength in water ?